lib/elastic_apm/spies/action_dispatch.rb

# Licensed to Elasticsearch B.V. under one or more contributor
# license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright
# ownership. Elasticsearch B.V. licenses this file to you under
# the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

# frozen_string_literal: true

module ElasticAPM
  # @api private
  module Spies
    # @api private
    class ActionDispatchSpy
      # @api private
      module Ext
        def render_exception(request, exception_or_wrapper)
          context = ElasticAPM.build_context(
            rack_env: request, for_type: :error
          )
          exception =
            if exception_or_wrapper.is_a?(ActionDispatch::ExceptionWrapper)
              exception_or_wrapper.exception
            else
              exception_or_wrapper
            end
          ElasticAPM.report(exception, context: context, handled: false)

          super(request, exception_or_wrapper)
        end
      end

      def install
        ::ActionDispatch::ShowExceptions.prepend(Ext)
      end
    end

    register(
      'ActionDispatch::ShowExceptions',
      'action_dispatch/show_exception',
      ActionDispatchSpy.new
    )
  end
end